We’re on a rooftop terrace at Cannes’ glitziest hotel, with Hollywood royalty milling around in their fanciest frocks. Gliding among them is Rochelle Humes, looking every inch the A-lister in a daringly sheer dress. Just normal life for her these days, surely? “It really isn’t! This is very surreal for me,” Rochelle grins, admitting she “can’t play it cool” about making her red-carpet debut for L’Oréal Paris, the Cannes Film Festival’s official make-up sponsor for 25 years.